Saudi Arabia has accused Russian President Vladimir Putin of hypocrisy, telling an Arab summit that he should not express support for the Middle East while fueling instability by supporting Syrian leader Bashar Assad.

The personal details of world leaders, including Russian President Vladimir Putin, were accidentally disclosed by an Australian official ahead of last year's G20 summit in Brisbane, a news report said Monday.

Russia's brand-new T-14 Armata main battle tank, which is set to be officially unveiled to the public at a Victory Day parade on Red Square on May 9, has reportedly been sighted readying for the ceremonies outside Moscow.